kiri-wchat/common/Help.php

<?php


namespace common;


class Help extends Miniprogarampage
{

	/**
	 * @param array $data
	 * @return string
	 */
	public static function toXml(array $data)
	{
		$xml = "<xml>";
		foreach ($data as $key => $val) {
			if (is_numeric($val)) {
				$xml .= "<" . $key . ">" . $val . "</" . $key . ">";
			} else {
				$xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
			}
		}
		$xml .= "</xml>";
		return $xml;
	}


	/**
	 * @param $xml
	 * @return mixed
	 */
	public static function toArray($xml)
	{
		if (!is_null($json = json_decode($xml, TRUE))) {
			return $json;
		}
		if (is_array($json)) {
			return $json;
		}
		$data = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
		return json_decode(json_encode($data), TRUE);
	}


	/**
	 * @param int $length
	 * @return string
	 *
	 * 随机字符串
	 */
	public static function random($length = 20)
	{
		$res = [];
		$str = 'abcdefghijklmnopqrstuvwxyz';
		$str .= strtoupper($str) . '1234567890';
		for ($i = 0; $i < $length; $i++) {
			$rand = substr($str, rand(0, strlen($str) - 2), 1);
			if (empty($rand)) {
				$rand = substr($str, strlen($str) - 3, 1);
			}
			array_push($res, $rand);
		}

		return implode($res);
	}

	/**
	 * @param array $array
	 * @param $key
	 * @param $type
	 * @return string
	 */
	public static function sign(array $array, $key, $type)
	{
		ksort($array, SORT_ASC);
		$string = [];
		foreach ($array as $hashKey => $val) {
			if (empty($val)) {
				continue;
			}
			$string[] = $hashKey . '=' . $val;
		}
		$string[] = 'key=' . $key;
		$string = implode('&', $string);
		if ($type == 'MD5') {
			return strtoupper(md5($string));
		} else {
			return hash('sha256', $string);
		}
	}

}